[특허]Continuous two stage, dual path anaerobic fermentation of butanol and other organic solvents using two different strain

Continuous two stage, dual path anaerobic fermentation of butanol and other organic solvents using two different strain 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C12P-007/40 C12P-007/56 C12P-007/54 C12P-007/14
출원번호	US-0771065 (1996-12-20)
발명자 / 주소	Ramey David Edward
출원인 / 주소	Environmental Energy, Inc.
대리인 / 주소	Foster
인용정보	피인용 횟수 : 85 인용 특허 : 0

초록 ▼

The instant invention describes a process for the manufacture of butanol and like volatile organic compounds by fermenting carbohydrates, mainly polysaccharide, with micro-organisms which convert carbohydrates into mainly butyric acid and other acids. The acids are subsequently transferred to the solventogenesis production stage using a different strain of bacteria which continuously produces butanol and like volatile organic compounds, via a multistage fermentation process that is stable, high yielding (weight product per unit weight carbohydrates) and productive (faster throughput). By employing one microbe (the first) in the major pathway to produce the acid of choice specifically and faster, and provide for another microbe (the second) with the unique property to convert the acid to a solvent, carbohydrates are not wasted on ancillary product. The unique advantage of the second microbe is that it has the capability of converting acids into solvents (solventogenesis). For example Clostridium acetobutylicum passes though two morphologies, first acid producing (acidogenesis), yielding acetic, butyric, and lactic acids from the carbohydrate source. Then C. acetobutylicum shifts its physiology into a solventogenesis phase for the latter part of its life cycle, converting the acids it produced through acidogenesis into acetone, butanol, ethanol and isopropanol. The instant invention increases the yield by decreasing the production of ancillary acids and alcohols. It increases the volumetric productivity since the first bacteria produces butyric or a like acid faster and in a better yield than the second bacteria.

대표청구항 ▼

[ I claim:] [1.] A continuous process for preparing solvents by digesting carbohydrates in an anaerobic fermentation of a carbohydrate slurry, the method comprising:(a) feeding a major portion of the carbohydrate slurry and a first acid-producing clostridium bacteria into an acid reactor and effecting the continuous fermentation of the carbohydrate with the first bacteria to form a solution including a short chain organic acid;(b) feeding a minor portion of the carbohydrate slurry and a second solvent-producing clostridium bacteria into a breeder reactor to breed the second bacteria in an acidogenesis phase;(c) extracting acid solution from the acid reactor and transferring the acid to a solventogenesis reactor;(d) extracting the second acidogenesis bacteria from the breeder reactor and transferring the second bacteria into the solventogenesis reactor and effecting the anaerobic fermentation of the extracted acid with the second bacteria to form a solution including a short chain alcohol; and(e) extracting the alcohol solution from the solventogenesis reactor at a rate sufficient to maintain the solventogenesis fermentation.

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A	생활필수품
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연합인증

Continuous two stage, dual path anaerobic fermentation of butanol and other organic solvents using two different strain 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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연합인증

Continuous two stage, dual path anaerobic fermentation of butanol and other organic solvents using two different strain 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

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이 특허를 인용한 특허 (85)

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